<template>
  <!-- eslint-disable -->
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>     
     </el-breadcrumb>


     <!-- 卡片视图 -->
     <el-card>
       <!-- 添加角色按钮区 -->
       <el-row>
         <el-col>
           <el-button type="primary">添加角色</el-button>
         </el-col>
       </el-row>
       <!-- 角色列表区 -->
        <el-table :data="roleList" border stripe>
          <!-- 展开列 -->
          <el-table-column type="expand">
            <template slot-scope="scope">
              <el-row :class="['bdbottom', i1 == 0 ? 'bdtop':'', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                <!-- 渲染一级权限 -->
                <el-col :span="5">
                  <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                  <!-- 渲染二级和三级权限 -->
                  <el-col :span="19">
                    <!-- 嵌套循环渲染二级权限 -->
                    <el-row :class="['bdtop', i2 == 0 ? '': 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                      <el-col :span="6">
                        <el-tag closable @close="removeRightById(scope.row,item2.id)"  type="success">{{item2.authName}}</el-tag>
                        <i class="el-icon-caret-right"></i>
                      </el-col>
                      <el-col :span="18">
                        <el-tag closable @close="removeRightById(scope.row,item3.id)" type="warning" v-for="(item3, i3) in item2.children" :key="item3.id">
                          {{item3.authName}}
                        </el-tag>
                      </el-col>
                    </el-row>
                  </el-col>
              </el-row>
              <!-- <pre>
                {{scope.row}}
              </pre> -->
            </template>
</el-table-column>
<!-- 索引列 -->
<el-table-column type="index"></el-table-column>
<el-table-column label="角色名称" prop="roleName"></el-table-column>
<el-table-column label="角色描述" prop="roleDesc"></el-table-column>
<el-table-column label="操作">
    <template slot-scope="scope">
              <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
              <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
              <el-button @click="showSetRightDialog(scope.row)" size="mini" type="warning" icon="el-icon-setting">分配权限</el-button>
            </template>
</el-table-column>
</el-table>
</el-card>



<!-- 分配权限的对话框 -->
<el-dialog @close="setRightDialogClose" title="分配权限" :visible.sync="setRightDialogVisible" width="50%">
    <!-- 树形控件 -->
    <el-tree ref="treeRef" :default-checked-keys="defKeys" default-expand-all :data="rightsList" :props="treeProps" show-checkbox node-key="id"></el-tree>
    <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button @click="allotRights" type="primary" >确 定</el-button>
  </span>
</el-dialog>
</div>
</template>


<script>
    export default {
        data() {
            return {
                // 所有角色列表数据
                roleList: [],
                // 控制分配权限对话框的显示与隐藏
                setRightDialogVisible: false,
                // 所有权限的数据
                rightsList: [],
                // 树形控件的属性绑定对象
                treeProps: {
                    label: 'authName',
                    children: 'children'
                },
                // 默认选定的节点的id值的节点
                defKeys: [],
                // 当前即将分配权限的角色id
                roleId: ''
            }
        },
        created() {
            this.getRolesList()
        },
        methods: {
            // 获取所有角色的列表
            async getRolesList() {
                const {
                    data: res
                } = await this.$http.get("roles")
                if (res.meta.status != 200) {
                    return this.$message.error("获取角色列表失败")
                }
                this.roleList = res.data
                console.log(this.roleList);
            },
            // 找到id删除对应的权限
            async removeRightById(role, rightId) {
                // 弹框提示用户是否要删除
                const confirmResult =
                    await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                        confirmButtonText: '确定',
                        cancelButtonText: '取消',
                        type: 'warning'
                    }).catch(err => err)
                if (confirmResult != 'confirm') {
                    return this.$message.info("取消删除")
                }
                // console.log("确认删除");
                const {
                    data: res
                } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

                if (res.meta.status != 200) {
                    return this.$message.error("删除权限失败")
                }
                // this.getRolesList()
                role.children = res.data
            },
            // 展示分配权限的对话框
            async showSetRightDialog(role) {
                this.roleId = role.id;
                // 获取多有权限的数据
                const {
                    data: res
                } = await this.$http.get("rights/tree")
                if (res.meta.status != 200) {
                    return this.$message.error("获取权限数据失败")
                }
                // 获取到的权限数据保存到data中
                this.rightsList = res.data
                console.log(this.rightsList);
                // 递归获取三级节点的id
                this.getLeafKeys(role, this.defKeys)

                this.setRightDialogVisible = true
            },
            // 通过递归的形式,获取角色下所有三级权限的id,并保存到defKeys数组
            getLeafKeys(node, arr) {
                if (!node.children) {
                    // 如果当前node节点不包含children属性则是三级节点
                    return arr.push(node.id)
                }
                node.children.forEach(item => {
                    this.getLeafKeys(item, arr)
                })
            },
            // 监听分配权限对话框的关闭权限
            setRightDialogClose() {
                this.defKeys = []
            },
            // 点击为角色分配权限
            async allotRights() {
                const keys = [
                    ...this.$refs.treeRef.getCheckedKeys(),
                    ...this.$refs.treeRef.getHalfCheckedKeys()
                ]
                const idStr = keys.join(',')

                const {
                    data: res
                } = await this.$http.post(`roles/${this.roleId}/rights`, {
                    rids: idStr
                })
                if (res.meta.status != 200) {
                    return this.$message.error("分配权限失败")
                }
                this.$message.success("分配权限成功")
                this.getRolesList()
                this.setRightDialogVisible = false
            }
        },
    }
</script>



<style lang="less" scoped>
    .el-tag {
        margin: 10px;
    }
    
    .bdtop {
        border-top: 1px solid #eee;
    }
    
    .bdbottom {
        border-bottom: 1px solid #eee;
    }
    
    .vcenter {
        display: flex;
        align-items: center;
    }
</style>